59 
1937] Social Behavior in Homoptera 
minutes all had returned to remain safely covered for the 
night. 
Simanton (2) has published a very comprehensive account 
of this scale as it occurs on the peach in Pennsylvania. He 
has noted the well timed emergence in the morning, but 
does not mention having seen any evidence of a return in the 
evening. This performance may have been due solely to the 
de- vitalized condition of the tree upon which the observations 
were made. The total new twig growth did not exceed two 
inches per year, and hardly more than four scrawny leaves 
grew from each branch tip. Thus, suitable locations for 
feeding and growth were reduced to a minimum. The ap- 
parently aimless wanderings and the return during the night, 
may have been due solely to the restricted choice of feeding 
sites. 
LITERATURE CITED 
1. Bequaert, J., 1935. Presocial behavior among the Hemiptera. 
Bull. Brooklyn Ent. Soc. XXX, pp. 177-191. 
2. Simanton, W. A., 1916. U. S. D. A. Bull. 351. 
Book Review. — A Monograph of the British Neuroptera, 
Vol. I, by Frederick J. Killington. Pp. 1-269, 68 text-figures 
and 15 plates. Printed for the Ray Society and sold by 
Bernard Quaritch, Ltd., London. This is the first compre- 
hensive account of the British Neuroptera since MacLach- 
lan’s “Monograph” in 1868. The book is divided into six 
chapters. The first deals with the morphology of the families 
of British Neuroptera with special reference to the genitalia ; 
the second, third, and fourth are concerned with the meta- 
morphosis of the British species; the fifth deals with the 
bionomics ; and the sixth with the systematics of the Coniop- 
terygidae, Osmylidae, Sisyridae and a few genera of Hemer- 
obiidae. The second volume will apparently consist of a 
systematic account of the rest of the Hemerobiidae and the 
Chrysopidae, as well as the entire bibliography. Although 
the systematic part of this book is of interest only to the 
specialist in the Neuroptera, the first five chapters should be 
of general interest to entomologists, since they contain much 
new information on the structure and biology of these insects. 
F. M. Carpenter. 
